Home / 31,204.31-43,081.02-20,312.78

Finding the Fourth Proportional to 31,204.31, 43,081.02 and 20,312.78

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Solution

The fourth proportional to 31,204.31, 43,081.02 and 20,312.78 is: 28,044.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,204.31 : 43,081.02 = 20,312.78 : x
  2. Step 2: Convert to fraction form
    31,204.31/43,081.02 = 20,312.78/x
  3. Step 3: Cross multiply
    31,204.31x = 43,081.02 × 20,312.78
  4. Step 4: Simplify right side
    31,204.31x = 875,095,389.14
  5. Step 5: Solve for x
    x = 875,095,389.14/31,204.31
  6. Step 6: Final answer
    x = 28,044.05

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.